Evaluation of representative elementary volume for a vuggy carbonate rock - Part II: Two-phase flow

The effect of heterogeneities on the drainage capillary pressure curve and on spontaneous imbibition has been investigated. Nuclear Magnetic Resonance (NMR) 1D-saturation monitoring performed on a sample after a centrifuge test was used to investigate the air-water drainage capillary pressure curve. The obtained curve indicated variations along the sample. Imaging of the displacement front for spontaneous imbibition was performed to investigate impact of heterogeneities on the process.